Update index.md (#32633)
Update index.md (#32633)

Minor punctuation cleanup
BhaveshSGupta/FreeCodeCamp,raisedadead/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,raisedadead/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,jonathanihm/freeCodeCamp,jonathanihm/freeCodeCamp,BhaveshSGupta/FreeCodeCamp